Gas-engine



7 attached to the collar B 'NrTED STATES HADWEN SWAIN, OF SANFRANOISOO, CALIFORNIA.

-GAS-ENG|NE.

SPECIFICATION forming part of Letters Patent No. 535,964, dated March 19, 895.

Application filed August 20, 1894.

To all whom it may concern:

Be it knownthat I, HADWEN SWAIN, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Gas-Engines; and I do hereby declare the following to be a full, clear, and exact description of said invention, such as will enable others skilled in the art to which it most nearly appertains to make, use, and practice the same.

This invention relates to improvements in gas engines and more particularly to a governor therefor by means of which the flow of the gas may be regulated by the speed of the engine. a

In the drawings, Figure 1. is a sectional view of the cylinder, piston, driving shaft and the devices forming the governor. Fig. 2. is a detail view showing the construction of the rocking arm.

In this form of engine the inlet port is closed by thegravity valve A. This valve is mounted on the spindle A which extends through the boss A on the lower side of the supply chamber, A andis provided'with the head, A Resting on top of the head, A and surrounding the spindle by means of an elongated slot formed therein, I provide the wedge-shaped shoe, B. The purpose of this shoe is to regulate the action of the valve A, which is done by the interposition of different thicknesses of the shoe. The shoe is pivotally attached to the long end of the rocking arm, B.. At the lower end the rocking arm is forked to form the yoke, B whichispivotally The rocking arm is pivotally mounted on the bracket 0 which forms a part of the stationary frame of the engine. Extending upward from the web of the bracket is the extension, 0, in the end of which is mounted the set screw, C by means of which the forward throw of the rocking arm is regulated.

The collar B is loosely mounted on the thimble D. The thimble is loosely mounted on the driving shaft, S, and is advanced or receded by the spreading or contracting of the centrifugal weights, E. E. The thimble is provided with the annular groove, D, in which the ends of the fingers, E, E, of the Serial No. 520,828. on model.)

centrifugal weights rest. Back of the groove D, the thimble is'cut away to receive the collar, B and to form the shoulder, D9, against which the collar rests.

The centrifugal weights E. E. are pivotally mounted in brackets extended out from the collar E, which is rigidly mounted on the driving shaft. The weighted ends of the weights E, E, are connected by the spiral spring E which draws the said ends together.

To maintain the collar, B against the shoulder, D I provide the spring, F, one end of which is secured to the side of the cylinder and the other end to the shoe B between the spindle of the valve and the rocking arm. By this arrangement the tension of the spring operates to seat the valve and draw in the upper end of the rocking arm and consequently throw outward the'lower end against the shoulder, D

In its operation this invention is designed to govern the speed of the engine by regulating the supply of gas passing into the explosion chamber and thereby overcome the objection to the present forms wherein the charge is either out out completely or given full and thereby producing an alternately fast and slow speed.

When provided with this invention the excess speed throws the weighted ends E, E, apart, which in spreading draw, by means of the fingers, E, E, the thimble, D, outward in proportion as the weighted ends are spread. This movement on the part of the thimble, D, permits-the spring, F, to draw inward the upper end of the rocking arm, B, and thereby insert between the head, A and boss A the thicker portion of the shoe B. It will be observed that the movement of the shoe, B, is proportioned to the movement of the thimble, D, and weights E, E, so that a slight movement of the thimble allows for an increased movement on the part of the shoe, thereby making the regulation very sensitive. \Vhen the shoe, B, is thus moved between the head, A and boss, A the valve is prevented from rising off its seat only so far as is permitted by the thickness of that part of-the shoe which is interposed. WVhen now the speed is slowed down, the spring, E, draws the weights E, E, together, and, by means of the fingers, E,

arm, the sleeve to which the forked ends of the arm are pivotally connected, carried by 15 the thimble D loosely mounted on the driving shaft, and the centrifugal weights carried by the thimble; substantially as and for the purpose set forth.

In testimony whereof I have hereunto set 20 my hand this 23d day of June, 1894.

HADWEN SWAIN.

Witnesses:

S. W. SWAIN, I. WmsLoW. 

